<template>
  <div>
    <nav-bar>
      <div slot="left" class="back" @click="backClick">
        <img src="~assets/img/common/back.svg" alt="" />
      </div>
      <div slot="center" class="title">
        <div v-for="(item, index) in titles" :key="index" class="title-item" :class="{ active: currentIndex === index }" @click="titleClick(index)">
          {{ item }}
        </div>
      </div>
    </nav-bar>
  </div>
</template>

<script>
  import NavBar from 'components/common/navbar/NavBar.vue'
  export default {
    components: {
      NavBar
    },
    data() {
      return {
        titles: ['商品', '参数', '评价', '推荐'],
        currentIndex: 0
      }
    },
    methods: {
      titleClick(index) {
        this.currentIndex = index
        //发出联动事件和参数
        this.$emit('titleClick', index)
      },
      backClick() {
        // this.$router.go(-1)
        this.$router.back()
      }
    }
  }
</script>

<style scoped>
.back img {
  vertical-align: middle;
}
.title {
  display: flex;
  font-size: 14px;
}
.title-item {
  flex: 1;
}
.active {
  color: var(--color-high-text);
}
</style>